1400065 has 4 divisors (see below), whose sum is σ = 1680084. Its totient is φ = 1120048.

The previous prime is 1400051. The next prime is 1400081. The reversal of 1400065 is 5600041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 531441 + 868624 = 729^2 + 932^2 .

It is a cyclic number.

It is not a de Polignac number, because 1400065 - 2⁹ = 1399553 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140002 + ... + 140011.

It is an arithmetic number, because the mean of its divisors is an integer number (420021).

2^1400065 is an apocalyptic number.

It is an amenable number.

1400065 is a deficient number, since it is larger than the sum of its proper divisors (280019).

1400065 is an equidigital number, since it uses as much as digits as its factorization.

1400065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280018.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1400065 is about 1183.2434238144. The cubic root of 1400065 is about 111.8706254857.

The spelling of 1400065 in words is "one million, four hundred thousand, sixty-five".